When a man is captured in a were-rat lair they want him to join their ranks, but he can only be turned if he agrees to be made immortal by the bite. At first he refuses, preferring death to such a disgusting fate, but when they threaten his wife he relents. They unchain the woman but she does not flee to the confusion of the man, until she shifts into were-rat form in order to apply the bite on her mate.